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Hybrid electrochemical sensor platform for capsaicin determination using coarsely stepped cyclic squarewave
Sindre Søpstad1, Kristin Imenes1, Erik A Johannessen1
1Department of Microsystems, Faculty of Technology, Maritime and Natural Sciences, University of South-Eastern Norway, Borre, Norway.
Biosensors & Bioelectronics
|October 1, 2018
Summary
A novel electrochemical sensor platform offers a simplified, low-cost method for detecting capsaicin using adsorptive stripping voltammetry. This reusable sensor achieves a low detection limit, making it suitable for various applications.
Area of Science:
- Electrochemistry
- Analytical Chemistry
- Sensor Technology
Background:
- Electrochemical sensors are crucial for detecting various analytes.
- Developing low-cost, portable sensing platforms is a significant challenge.
- Capsaicin detection is important in food and pharmaceutical industries.
Purpose of the Study:
- To demonstrate a standalone electrochemical hybrid sensor platform for capsaicin determination.
- To simplify the sensing scheme for compatibility with low-cost devices.
- To develop a reusable sensor with enhanced sensitivity and a low detection limit.
Main Methods:
- Utilized a hybrid sensor platform with flexible electronics and screen-printed electrodes.
- Employed adsorptive stripping voltammetry with coarsely stepped squarewave voltammetry.
- Developed an ethanol rinsing protocol for electrode reusability.
- Investigated the effect of ethanol/buffer volumetric ratio on analytical data.
Main Results:
- The sensor platform successfully determined capsaicin concentrations up to 5000 µM.
- Achieved a low detection limit of 1.98 µM for capsaicin.
- Demonstrated electrode reusability through an ethanol rinsing protocol.
- Identified an optimal ethanol/buffer ratio of 10% (v/v) for signal-to-noise and solubility.
Conclusions:
- A simplified, low-cost electrochemical sensor platform for capsaicin detection has been successfully developed.
- The sensor is suitable for a wide range of capsaicin concentrations and offers good sensitivity.
- The reusable screen-printed electrodes and simplified voltammetry technique make the platform practical for widespread use.
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